The term boomtown was used to describe what king of western town?

The term "boomtown" refers to a town that experiences rapid economic growth and population influx, often due to the discovery of valuable resources like gold or silver. These towns typically emerge quickly as people flock to the area in search of wealth and opportunities, leading to a bustling atmosphere with new businesses and infrastructure. However, boomtowns can also face challenges such as instability and decline once the resource is depleted or the initial excitement fades.